package servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import DB.CouchDB;
import DB.GroupAndUsersTableDB;

import com.google.gson.JsonObject;

public class GetGroupMembers extends HttpServlet {

	ArrayList<JsonObject> Message;

	/**
	 * Constructor of the object.
	 */
	public GetGroupMembers() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		String groupID = (String) request.getAttribute("groupID");
		JsonObject object = new JsonObject();
		if (groupID == null || groupID.equals("")) {
			object.addProperty("message", "Group should not be empty!");
			response.setContentType("application/json");
			PrintWriter out = response.getWriter();
			out.print(object);
			out.flush();
			out.close();
		} else {
			GroupAndUsersTableDB groupAndUsersTableDB = new GroupAndUsersTableDB();
			CouchDB db = new CouchDB();
			ArrayList<JsonObject> list = groupAndUsersTableDB
					.selectGroupAndUsersByGroup(groupID);
			for (JsonObject json : list) {
				Message.add(db.getUser(json.get(GroupAndUsersTableDB.USERFK)
						.toString()));
			}
			response.setContentType("application/json");
			PrintWriter out = response.getWriter();
			out.print(Message);
			out.flush();
			out.close();
		}
	}

	/**
	 * Initialization of the servlet. <br>
	 * 
	 * @throws ServletException
	 *             if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
